Assign no value to the top node and set self.size with zero elements. class Stack: def __init__(self): # Initially

Here's the code to assign no value to the top node and set `self.size` with zero elements: ``` class Stack: def __init__(self): # Initially there won't be any node at the top of the stack self.top = None # Initially there will be zero elements in the stack self.size = 0 ``` This initializes a new empty stack with no nodes and a size of zero.